Resuming issue in Windows Phone

What is up with this constant resuming issue in windows phone 8.1 ??? Every app that I want to switch back to is giving me this resuming black screen and often times all my progress is lost in the previous app that I'm trying to switch back to ! I'm getting frustrated with this. There is hardly any smooth transition back to a former app if i leave the app for more than a minute. Smh..wow. What's up with this Microsoft? Anyone else experiencing this and know how to reduce this ?

Do you have Live Lockscreen beta installed?
Sent from my Nokia Lumia 920 via Tapatalk

I stopped using that a long time ago but still have issues. And I'm on developer preview 8.1 with folder support. Nokia Lumia 928 so it may be a cyan thing. Idk but the issue has been occurring lately A LOT.

I stopped using that a long time ago but still have issues. And I'm on developer preview 8.1 with folder support. Nokia Lumia 928 so it may be a cyan thing. Idk but the issue has been occurring lately A LOT.